CN202285220U - Differential relay output control circuit - Google Patents
Differential relay output control circuit Download PDFInfo
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- CN202285220U CN202285220U CN 201120394596 CN201120394596U CN202285220U CN 202285220 U CN202285220 U CN 202285220U CN 201120394596 CN201120394596 CN 201120394596 CN 201120394596 U CN201120394596 U CN 201120394596U CN 202285220 U CN202285220 U CN 202285220U
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- channel mos
- driving tube
- relay
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- mos driving
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Abstract
The utility model provides a differential relay output control circuit, which comprises a microprocessor U10, a pull-up resistor R2, a metal oxide semiconductor (MOS) tube isolation driving module U1, a P channel MOS driving tube Q2, a pull-down resistor R3, an MOS tube isolation driving module U2, an N channel MOS driving tube Q1, a current-limiting resistor R1, a relay K1 and a diode D1. A first control port and a second control port of the microprocessor U10 respectively control connecting or disconnecting of the P channel MOS driving tube Q2 and the N channel MOS driving tube Q1 through the MOS tube isolation driving module U1 and the MOS tube isolation driving module U2. The P channel MOS driving tube Q2 and the N channel MOS driving tube Q1 together control closing and opening of a relay coil. The differential relay output control circuit has the advantages of simple circuit structure, high reliability, strong stability and high practicality.
Description
Technical field
The utility model relates to a kind of control relay circuit, specifically, has related to a kind of differential type relay output control circuit.
Background technology
In the industrial gasses detection application; Control field apparatus through regular meeting's using gases alarm controller or gas detector output relay, but on-the-spot a lot of equipment generally can not be arbitrarily out of service, otherwise; Can cause the accidental damage or the raw-material waste of whole production line; Container production line for example, if the equipment accident shuts down, the raw material of foaming usefulness just might be solidificated in device interior; Not only waste the raw material that are worth hundreds of thousands, also might cause the equipment scrapping of millions of units.
Relay output control circuit of the prior art, as shown in Figure 1, it includes microprocessor U10, pull down resistor R3, metal-oxide-semiconductor isolation drive module U2, N-channel MOS driving tube Q1, current-limiting resistance R1, relay K 1 and diode D1; In industry spot; Because power utilization environment is complicated, various powerful devices produce network source and disturb, and produce the impulse disturbances that voltage amplitude can reach thousands of volts; Being reacted on the circuit is exactly the impulse disturbances of voltage far above the weak electricity system supply voltage; The pulse amplitude that this interference produces on all uniformity signal lines is identical, if interference signal is enough strong, will cause the N-channel MOS driving tube Q1 conducting of relay output control circuit of the prior art; Produce misoperation, bring unpredictable danger; Obviously, relay output control circuit of the prior art can not guarantee the unexpected misoperation that causes of disturbing.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The purpose of the utility model is the deficiency to prior art, thereby the differential type relay that a kind of circuit structure is simple, reliability is high, stability is strong, practicality is high output control circuit is provided.
To achieve these goals; The technical scheme that the utility model adopted is: a kind of differential type relay output control circuit, and it includes microprocessor U10, pull-up resistor R2, metal-oxide-semiconductor isolation drive module U1, P channel MOS driving tube Q2, pull down resistor R3, metal-oxide-semiconductor isolation drive module U2, N-channel MOS driving tube Q1, current-limiting resistance R1, relay K 1 and diode D1; Wherein, First control port of said microprocessor U10 connects the input of said pull-up resistor R2 one end and said metal-oxide-semiconductor isolation drive module U1 respectively; The output of said metal-oxide-semiconductor isolation drive module U1 connects the grid of said P channel MOS driving tube Q2; The drain electrode of said P channel MOS driving tube Q2 connects the end of said current-limiting resistance R1, and the said current-limiting resistance R1 other end is used to be connected working power with the said pull-up resistor R2 other end; Second control port of said microprocessor U10 connects the input of said pull down resistor R3 one end and said metal-oxide-semiconductor isolation drive module U2 respectively; Said pull down resistor R3 other end ground connection, the output of said metal-oxide-semiconductor isolation drive module U2 connects the grid of said N-channel MOS driving tube Q1; The source electrode of said P channel MOS driving tube Q2 connects coil one end of said relay K 1, and the coil other end of said relay K 1 connects the drain electrode of said N-channel MOS driving tube Q1, the source ground of said N-channel MOS driving tube Q1; The negative pole of said diode D1 connects coil one end of said relay K 1, and the positive pole of said diode D1 connects the coil other end of said relay K 1.
The relative prior art of the utility model has substantive distinguishing features and progress; Specifically; It is the characteristic of common mode disturbances that this differential type relay output control circuit utilizes the interference of interference signal on the uniformity signal line, and uses the difference control circuit to eliminate the adverse effect of common mode disturbances; This differential type relay output control circuit can effectively be removed the various interference of industry spot; Avoided disturbing the unexpected output of the relay that causes; Avoided single-chip microcomputer to reset or powered up the relay accident of moment exporting; Reduced SCM program and run the probability that flies to cause the unexpected output of relay, it has the advantage that circuit structure is simple, reliability is high, stability is strong, practicality is high.
Description of drawings
Fig. 1 is the electrical block diagram of relay output control circuit of the prior art.
Fig. 2 is the electrical block diagram of the utility model.
Embodiment
Through embodiment, the technical scheme of the utility model is done further detailed description below.
As shown in Figure 2; A kind of differential type relay output control circuit, it includes microprocessor U10, pull-up resistor R2, metal-oxide-semiconductor isolation drive module U1, P channel MOS driving tube Q2, pull down resistor R3, metal-oxide-semiconductor isolation drive module U2, N-channel MOS driving tube Q1, current-limiting resistance R1, relay K 1 and diode D1; In the present embodiment, microprocessor U10 adopts single-chip microcomputer;
Wherein, First control port of said microprocessor U10 connects the input of said pull-up resistor R2 one end and said metal-oxide-semiconductor isolation drive module U1 respectively; The output of said metal-oxide-semiconductor isolation drive module U1 connects the grid of said P channel MOS driving tube Q2; The drain electrode of said P channel MOS driving tube Q2 connects the end of said current-limiting resistance R1, and the said current-limiting resistance R1 other end is used to be connected working power with the said pull-up resistor R2 other end; When operate as normal, said current-limiting resistance R1 can prevent that the coil overcurrent of said relay K 1 from burning out;
Second control port of said microprocessor U10 connects the input of said pull down resistor R3 one end and said metal-oxide-semiconductor isolation drive module U2 respectively; Said pull down resistor R3 other end ground connection, the output of said metal-oxide-semiconductor isolation drive module U2 connects the grid of said N-channel MOS driving tube Q1;
The source electrode of said P channel MOS driving tube Q2 connects coil one end of said relay K 1, and the coil other end of said relay K 1 connects the drain electrode of said N-channel MOS driving tube Q1, the source ground of said N-channel MOS driving tube Q1;
The negative pole of said diode D1 connects coil one end of said relay K 1, and the positive pole of said diode D1 connects the coil other end of said relay K 1.
The utility model utilizes the differential mode control principle to eliminate the common mode disturbances on the control signal; When interference signal; Interference signal might be delivered to the form of interference signal with common mode on the circuit board through stray inductance, electric capacity etc. from strong jammings such as power supply, static discharges, at this moment; Two of single-chip microcomputer will produce the pulse signal that amplitude is identical, direction is identical above the control port; After metal-oxide-semiconductor isolation drive module, produce two drive signals and be applied on two MOS driving tubes, conducting of two MOS driving tubes, one end; If positive interference signal; To be N-channel MOS driving tube Q1 conducting, P channel MOS driving tube Q2 ends, and Q1 will end if the negative interference signal will make the N-channel MOS driving tube; P channel MOS driving tube Q2 conducting; No matter what disturbs, have a MOS driving tube all the time and end, final relay can not produce action.
As the single-chip microcomputer of control chip, because model is different, powering on or the moment that resets, each I/O mouth of single-chip microcomputer possibly be in three kinds of different state: high-impedance state, low level output and high level output.Relay output control circuit of the prior art need be adjusted according to different single-chip microcomputer models, otherwise, will produce unexpected output; This differential type relay output control circuit can satisfy the requirement that cooperates with it fully to above three kinds of states; No matter promptly which state single-chip microcomputer is in and can produce unexpected output: when the single-chip processor i/o mouth powers on or reseting period when being in high-impedance state; Because relay drive circuit is through drawing drop-down with pull down resistor R3 on the pull-up resistor R2; When making the powered on moment single-chip microcomputer be in nondeterministic statement; Guarantee that N-channel MOS driving tube Q1, P channel MOS driving tube Q2 are in cut-off state fully, guarantee that relay K 1 does not have unexpected output; When the single-chip processor i/o mouth powers on or reseting period when being in low level output or high level output, then two MOS driving tubes always have one to be in blocking state, can guarantee that also relay K 1 does not have unexpected output.
This differential type relay output control circuit adopts two control port controls of single-chip microcomputer; Effectively reduce SCM program and run the probability that flies the unexpected output of back generation; Promptly; Behind the program fleet, at the probability of the probability that produces effective control signal on two I/O mouths simultaneously far below the effective control signal of generation on an I/O mouth.
Should be noted that at last: above embodiment only in order to the explanation the utility model technical scheme but not to its restriction; Although with reference to preferred embodiment the utility model has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can make amendment to the embodiment of the utility model perhaps is equal to replacement to the part technical characterictic; And not breaking away from the spirit of the utility model technical scheme, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (1)
1. differential type relay output control circuit, it is characterized in that: it includes microprocessor U10, pull-up resistor R2, metal-oxide-semiconductor isolation drive module U1, P channel MOS driving tube Q2, pull down resistor R3, metal-oxide-semiconductor isolation drive module U2, N-channel MOS driving tube Q1, current-limiting resistance R1, relay K 1 and diode D1; Wherein, First control port of said microprocessor U10 connects the input of said pull-up resistor R2 one end and said metal-oxide-semiconductor isolation drive module U1 respectively; The output of said metal-oxide-semiconductor isolation drive module U1 connects the grid of said P channel MOS driving tube Q2; The drain electrode of said P channel MOS driving tube Q2 connects the end of said current-limiting resistance R1, and the said current-limiting resistance R1 other end is used to be connected working power with the said pull-up resistor R2 other end; Second control port of said microprocessor U10 connects the input of said pull down resistor R3 one end and said metal-oxide-semiconductor isolation drive module U2 respectively; Said pull down resistor R3 other end ground connection, the output of said metal-oxide-semiconductor isolation drive module U2 connects the grid of said N-channel MOS driving tube Q1; The source electrode of said P channel MOS driving tube Q2 connects coil one end of said relay K 1, and the coil other end of said relay K 1 connects the drain electrode of said N-channel MOS driving tube Q1, the source ground of said N-channel MOS driving tube Q1; The negative pole of said diode D1 connects coil one end of said relay K 1, and the positive pole of said diode D1 connects the coil other end of said relay K 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120394596 CN202285220U (en) | 2011-10-17 | 2011-10-17 | Differential relay output control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120394596 CN202285220U (en) | 2011-10-17 | 2011-10-17 | Differential relay output control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202285220U true CN202285220U (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120394596 Expired - Lifetime CN202285220U (en) | 2011-10-17 | 2011-10-17 | Differential relay output control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202285220U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436972A (en) * | 2011-10-17 | 2012-05-02 | 河南汉威电子股份有限公司 | Output control circuit of differential relay |
| CN103346781A (en) * | 2013-06-17 | 2013-10-09 | 吴江圣博瑞信息科技有限公司 | Mechanical relay driving output protective circuit |
| CN103606486B (en) * | 2013-11-21 | 2015-04-22 | 宁波市鄞州华谦电子有限公司 | Relay drive circuit, relay and control method of relay drive circuit |
| CN106469628A (en) * | 2015-08-17 | 2017-03-01 | 佛山市顺德区美的电热电器制造有限公司 | For the protection control method of relay, device |
-
2011
- 2011-10-17 CN CN 201120394596 patent/CN202285220U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436972A (en) * | 2011-10-17 | 2012-05-02 | 河南汉威电子股份有限公司 | Output control circuit of differential relay |
| CN103346781A (en) * | 2013-06-17 | 2013-10-09 | 吴江圣博瑞信息科技有限公司 | Mechanical relay driving output protective circuit |
| CN103606486B (en) * | 2013-11-21 | 2015-04-22 | 宁波市鄞州华谦电子有限公司 | Relay drive circuit, relay and control method of relay drive circuit |
| CN106469628A (en) * | 2015-08-17 | 2017-03-01 | 佛山市顺德区美的电热电器制造有限公司 | For the protection control method of relay, device |
| CN106469628B (en) * | 2015-08-17 | 2019-05-31 | 佛山市顺德区美的电热电器制造有限公司 | For the protection control method of relay, device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170220 Address after: Dongling District of Shenyang City, Liaoning province 110000 deep groove Village No. 861-18 (301) -1 room Patentee after: SHENYANG HANWEI TECHNOLOGY CO., LTD. Address before: 450001 Zhengzhou high tech Development Zone, Henan, Cedar Road, No. 169 Patentee before: Henan Hanwei Electronics Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120627 |
|
| CX01 | Expiry of patent term |